65 Barracuda daily driver

Got a feeler gauge. All clearances check out on both as far as I can tell. 0.015 doesn't fit at the cover with a straightedge across and a 0.010 doesn't fit between the gears. The new feeler gauge didn't have a 0.014, but even the 0.013 doesn't fit between the outer side of the gears. The old pump's gear is thickness is very close to the minimum (0.825"). The new one is at 0.0835 ish. I'll swap it either way, because I already have it and I don't wanna have to this again.